/**
* Performs OAuth2 auth flow.
* @param OAuth2 $client auth client instance.
* @return Response action response.
* @throws \yii\base\Exception on failure.
*/
protected function authOAuth2($client)
{
if (isset($_GET['error'])) {
if ($_GET['error'] == 'access_denied') {
// user denied error
return $this->redirectCancel();
} else {
// request error
if (isset($_GET['error_description'])) {
$errorMessage = $_GET['error_description'];
} elseif (isset($_GET['error_message'])) {
$errorMessage = $_GET['error_message'];
} else {
$errorMessage = http_build_query($_GET);
}
throw new Exception('Auth error: ' . $errorMessage);
}
}
// Get the access_token and save them to the session.
if (isset($_GET['code'])) {
$code = $_GET['code'];
$token = $client->fetchAccessToken($code);
if (!empty($token)) {
return $this->authSuccess($client);
} else {
return $this->redirectCancel();
}
} else {
$url = $client->buildAuthUrl();
return Yii::$app->getResponse()->redirect($url);
}
}
